Recyclable microseismic sensor quick installation device and method suitable for different hole depths

Abstract

The present invention discloses a device and method for quickly installing a recoverable microseismic sensor suitable for different hole depths, including a handheld unit, a detection unit and a drilling unit, wherein the handheld unit includes a T-shaped handle and a rear cover body. There are three detection units, which are linearly connected in sequence. The rear end of the first detection unit is fixedly connected to the rear cover body, and the drilling unit is arranged at the front end of the last detection unit. The detection unit includes a housing, a detection rod, a microseismic sensor and a telescopic fixing assembly. The rear end of the detection rod is adjustably fixedly connected to the housing. The microseismic sensor is arranged inside the front end of the detection rod. The front end of the detection rod is threadedly connected to the rear end of the housing of the next detection unit. The detection rod is fixed inside the rock formation borehole by a telescopic fixing assembly, and the drilling unit is arranged at the front end of the detection rod of the last detection unit. The microseismic sensor of the present invention is well coupled with the deep hole rock formation, which is convenient for arranging multiple microseismic sensors at different depths of the borehole, and for three-dimensional monitoring of the rock formation, so that it can be quickly installed and recovered.

Description

Technical Field

[0001] The present invention relates to the technical field of microseismic sensors, and in particular to a quick installation device and method for recoverable microseismic sensors suitable for different hole depths. Background Art

[0002] The process of deformation and destruction of rock mass is almost always accompanied by the generation, expansion, friction and energy accumulation of cracks, and the energy is released in the form of stress waves, resulting in microseismic events. Microseismic monitoring is a three-dimensional real-time monitoring technology. Through microseismic sensors and acquisition systems, elastic wave signals emitted by rock mass ruptures can be collected at all times. By processing and analyzing the elastic wave signals, information such as the location, magnitude, energy, and seismic moment of rock mass ruptures can be obtained, and then dynamic prediction and early warning of rock mass dynamic disasters can be carried out based on this information. This technology has been used as an important means of early warning of disasters such as rock bursts, rock bursts, and high and steep slopes. It has been widely used in the construction of tunnel projects, mining projects, water conservancy projects, and petroleum projects, and has become an important technical guarantee for engineering management and disaster prevention.

[0003] During the installation of the microseismic monitoring system, one of the primary tasks is to ensure that the microseismic sensor effectively receives the elastic wave signal generated by rock mass fracture. Generally, the microseismic sensor is placed inside the rock mass by drilling to achieve the purpose of receiving the rock mass fracture signal. Therefore, whether the microseismic sensor is effectively and stably coupled with the borehole wall directly determines the effect of the implementation of the microseismic monitoring technology. The existing method is to embed the probe inside the coal rock mass or embed anchor rods through drilling to achieve full coupling between the microseismic sensor and the rock mass on the two sides and the top and bottom plates, but there are the following disadvantages: first, this method is usually only applicable to monitoring holes with shallow depths, and requires the monitoring holes to be completely concentric and the hole walls to be smooth, but these requirements are difficult to guarantee in actual construction; second, the installation device is large in size and is only applicable to monitoring holes with larger diameters, resulting in high cost of the monitoring holes; third, the entire transmission rod and the installation structure are rigidly inserted into the monitoring hole by applying pressure in the monitoring hole, which not only has large friction, which is easy to wear the cable or microseismic sensor, but is also easy to be stuck in the monitoring hole at a specific location and cannot be delivered to a specific installation location; fourth, since there are many cracks or faults in the rock mass in the deep hole, the cement mortar injected into the borehole by the traditional grouting method is prone to leakage along the cracks or faults, which causes the microseismic sensor to fail to fully couple with the rock mass due to the gaps not filled with cement mortar, and ultimately leads to failure of microseismic monitoring; fifth, the installation process is time-consuming and labor-intensive, and requires a lot of manpower.

[0004] Due to the excavation of roadways or tunnel projects, the stress concentration range changes, and the position of the sensor is not fixed, but moves with the mining process. In order to collect more abundant microseismic signals, the microseismic sensor needs to be fixed in the original rock stress zone. The microseismic sensor installed by the traditional method cannot be removed, resulting in increased costs. If the sensor fails, it cannot be repaired. At the same time, when drilling holes in soft rocks such as coal mines, the holes are very easy to collapse after forming, resulting in the inability to recover the sensor, causing economic losses. Therefore, it is necessary to conduct in-depth research on the coupling and rapid recovery of deep hole microseismic sensors and surrounding rocks. The existing installation method of deep borehole microseismic sensors has solved the problem of coupling and recovery of sensors with surrounding rocks to a certain extent, but there are still problems such as poor contact with surrounding rocks, difficulty in rapid recovery, and low recovery rate.

[0005] The Chinese patent with publication number CN114563813A discloses a microseismic sensor installation device and installation method for an upward-inclined deep hole. The device realizes grouting of the microseismic sensor at a local position by carrying its own slurry, which solves the problem that cement mortar in the upward-inclined deep hole is prone to leakage along cracks or faults, resulting in failure of coupling between the microseismic sensor and the rock mass. However, the device is relatively cumbersome when recovering the sensor, and the recovery rate of the sensor is low. For example, the Chinese patent with publication number CN117075189A discloses a microseismic sensor circulation installation device, installation and recovery method, which solves the technical problems in the prior art that monitoring is easily affected by the outside world and the sensor cannot be recovered. However, the coupling between the sensor and the deep hole rock formation is poor, and the monitoring result is not ideal. Therefore, it is difficult to realize the convenient and effective installation of the microseismic sensor in the monitoring hole, so that the installed microseismic sensor can effectively couple well with the hole wall, and realize a deep monitoring hole that requires the use of multiple microseismic sensors to monitor different parts of the microseismic. Therefore, the prior art urgently needs further improvement. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, one object of the present invention is to propose a quick installation device for recoverable microseismic sensors suitable for different hole depths, so as to solve the problems of poor contact between the microseismic sensors and the surrounding rocks, difficulty in rapid recovery and low recovery rate, poor coupling between the microseismic sensors and deep hole rock formations, unsatisfactory monitoring results, and difficulty in deploying multiple microseismic sensors at different depths of the borehole to achieve three-dimensional monitoring of the rock formation.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A quick installation device for a recyclable microseismic sensor suitable for different hole depths comprises a handheld unit, a detection unit and a drilling unit. The handheld unit comprises a T-shaped handle and a rear cover body. The rear cover body is located on the front side of the T-shaped handle. The front end of the T-shaped handle is fixedly connected to the center of the rear cover body.

[0009] There are at least two detection units, and all the detection units are linearly arranged in sequence on the front side of the rear cover body. The corresponding ends of any two adjacent detection units are detachably fixedly connected, the rear end of the first detection unit is fixedly connected to the rear cover body, and the drilling unit is arranged at the front end of the last detection unit.

[0010] The detection unit includes a shell, a detection rod, a microseismic sensor and a telescopic fixing assembly. The shell is a round tube with open ends. The rear end of the detection rod is inserted into the interior of the shell and slidably cooperates with the inner wall of the shell. The microseismic sensor is fixedly arranged inside the front end of the detection rod. The front end of the detection rod is threadedly fixed to the rear end of the shell of the next detection unit.

[0011] The telescopic fixing assembly is located outside the front end of the shell, and includes an annular hydraulic bag and multiple rock formation coupling plates. The annular hydraulic bag is sleeved on the outside of the detection rod, and all the rock formation coupling plates are evenly arranged in a ring shape on the periphery of the annular hydraulic bag, and the inner side of each rock formation coupling plate is connected to the outer wall of the annular hydraulic bag.

[0012] The drilling unit comprises a drill bit and a driving assembly, wherein the driving assembly is fixed to the front end of the detection rod of the last position detection unit, and the drill bit is located at the front side of the driving assembly and is fixedly connected to the output end of the driving assembly.

[0013] Furthermore, the T-shaped handle is composed of two sections of steel pipes, one of which is arranged horizontally and the other is arranged horizontally longitudinally. The rear end of the longitudinally arranged steel pipe is fixedly welded to the middle of the transversely arranged steel pipe, and its interior is connected to the interior of the transversely arranged steel pipe.

[0014] The rear cover body is a circular steel plate with a central opening. The front end of the longitudinally arranged steel pipe passes through the rear cover body and is fixedly welded to the rear cover body to form a whole.

[0015] Furthermore, the inner side wall of the shell is provided with two sections of guide grooves, and the two sections of guide grooves are symmetrically arranged about the axis of the shell.

[0016] Two strip sliders corresponding to the guide groove are symmetrically arranged on the outer side of the rear part of the detection rod. The strip sliders are fixedly welded to the outer wall of the detection rod. Each strip slider is located in a corresponding section of the guide groove. The detection rod slides forward and backward with the shell through the two strip sliders.

[0017] Furthermore, the outer side wall of the shell has two sections of sink grooves corresponding to the guide grooves one by one, and the bottom of each section of the sink groove is provided with a long hole extending along the axial direction of the shell.

[0018] A positioning screw is provided on the outer wall of the two strip-shaped sliders on the side away from each other. The axis of the positioning screw is arranged perpendicularly to the axis of the shell. The end of the positioning screw passes through the long hole on the same side and is equipped with a positioning nut.

[0019] Furthermore, the detection rod is an integrated structure consisting of an upper connecting section, a necked section and a lower connecting section arranged in sequence from back to front, the upper connecting section and the lower connecting section have the same outer diameter, the outer diameter of the necked section is smaller than the outer diameter of the upper connecting section, and an arc transition is used at the connection between the necked section and the upper connecting section and the lower connecting section.

[0020] The detection rod is a hollow rod with a closed front end. The microseismic sensor is fixedly installed inside the lower connecting section. The signal cable of each microseismic sensor enters the T-shaped handle through the rear end of the detection rod of the first secondary detection unit, and passes through a port on one side of the T-shaped handle to be connected to the signal receiving end of the monitoring equipment.

[0021] Furthermore, the annular hydraulic bag is in the shape of an annular ring made of nitrile rubber, the annular hydraulic bag is sleeved on the outside of the necked section, and the inner side of the annular hydraulic bag is fixedly bonded to the circumferential side wall of the necked section.

[0022] The inner side of the annular hydraulic bag is provided with oil inlet and outlet branch pipes, the ends of which extend to the inside of the detection rod and are provided with quick connectors. Each oil inlet and outlet branch pipe is connected to the oil inlet and outlet main pipes located inside the detection rod through the quick connector. The ends of the oil inlet and outlet main pipes pass through the other side port of the T-shaped handle and can be connected to the hydraulic oil station.

[0023] Furthermore, the outer side of the annular hydraulic bag is provided with limit rods whose number is equal to the rock formation coupling plates and whose positions correspond one to one. Each limit rod body is arranged relatively parallel to the axial direction of the detection rod, and its two ends are fixedly connected to the corresponding ends of the lower connecting section and the upper connecting section respectively.

[0024] The outer wall of the rock formation coupling plate is an arc surface matching the inner wall of the borehole, and a strip connecting plate is arranged on the inner side thereof. Each strip connecting plate is arranged along the normal direction of the cross section of the detection rod, and is slidably penetrated on the inner side of the corresponding limit rod. One end is fixedly connected to the inner wall of the rock formation coupling plate, and the other end is connected to an inner arc plate. Each inner arc plate is fixedly connected to the outer wall of the annular hydraulic bag by vulcanization.

[0025] Furthermore, a front end cover is fixedly installed at the front end of each detection rod in an embedded manner, and the microseismic sensor is fixed on the rear side wall of the front end cover and fixedly bonded to the cavity wall of the lower connecting section.

[0026] The tube wall of the lower connecting section is provided with a plurality of threading channels evenly arranged in an annular shape, one end of the threading channel is located on the front end surface of the lower connecting section and is provided with a rubber plug, and the other end is located on the cavity wall of the lower connecting section.

[0027] The driving assembly includes a motor box and a servo motor. The motor box is fixedly installed at the front end of the detection rod of the last position detection unit. The servo motor is installed in the motor box, and its output shaft passes through the front side of the motor box and is coaxially fixedly connected to the drill bit.

[0028] Another object of the present invention is to provide a method for quickly installing a recyclable microseismic sensor suitable for different hole depths.

[0029] A method for quickly installing a recyclable microseismic sensor suitable for different hole depths is provided, using the above-mentioned device for quickly installing a recyclable microseismic sensor suitable for different hole depths. The method comprises the following steps:

[0030] Step 1: Determine the scope of the crushing area, stress concentration area, and original rock stress area of ​​the surrounding rock chamber, determine the detection position of the rock wall and the drilling depth of the detection position, then drill into the rock mass and use a high-pressure fan to remove the gravel and dust inside the borehole.

[0031] Step 2: Determine the number of microseismic sensors to be deployed and the detection points of each microseismic sensor at different depths of the borehole according to monitoring requirements, assemble the handheld unit, drilling unit and detection units into one, pull the detection rod of each monitoring unit out of its housing to the maximum length and fix it to its housing.

[0032] Step 3: Connect each annular hydraulic bag to the pipeline of the hydraulic oil station. The hydraulic oil station starts to work to drain the hydraulic oil of each annular hydraulic bag. The rock formation coupling plate remains in a contracted state close to the outer wall of the detection rod.

[0033] The driving assembly of the drilling unit is connected to a power source, and the drilling unit is inserted into the borehole. After the drill bit trims the inner wall of the borehole into a regular circle, it is taken out of the borehole, and the gravel and dust inside the borehole are removed again using a high-pressure fan.

[0034] Step 4: Release the fixation between the detection rod and its outer shell, adjust the relative position of the detection rod and its outer shell according to the detection point position of each microseismic sensor in the borehole, and then re-fix each detection rod to its outer shell.

[0035] Connect the signal cable connected to the signal end of each microseismic sensor to the monitoring equipment, insert the assembled microseismic sensor quick installation device into the borehole, fit the rear cover body to the rock wall at the outer port of the borehole, and each microseismic sensor reaches the predetermined monitoring point.

[0036] Step 5: The hydraulic oil station supplies oil and pressurizes each annular hydraulic bag. The annular hydraulic bag drives each rock formation coupling plate outside it to move synchronously outward to achieve expansion. The rock formation coupling plate adheres to and presses against the inner wall of the borehole. After that, the annular hydraulic bag stops supplying oil and keeps the internal pressure constant.

[0037] Step 6: Start each microseismic sensor through the monitoring equipment. The microseismic sensor collects the vibration wave signal from the rock wall in real time. When the monitoring is completed and the microseismic sensor needs to be moved, turn off each microseismic sensor, discharge the hydraulic oil of each annular hydraulic bag, and after the rock formation coupling plate shrinks inward, take out the microseismic sensor quick installation device from the borehole.

[0038] By adopting the above technical solution, the beneficial technical effects of the present invention are:

[0039] 1. The present invention utilizes a steel shell to protect the microseismic sensor, making it less susceptible to rock deformation, and can quickly realize the installation and recovery of the microseismic sensor, with a high reuse rate. It can not only make the microseismic sensor well coupled with the coal rock mass and improve the quality of the signal received by the microseismic sensor, but also make the microseismic sensor quickly contact with the surrounding rock, and can be installed in various directions without worrying about problems such as leakage, thereby enhancing the installation applicability of the microseismic sensor.

[0040] 2. Through the cleverly designed connection mechanism, the microseismic sensor can be arranged at any depth and any position in the bedrock section, so that the microseismic sensor does not have to be installed at the bottom of the borehole. It is only necessary to use the sliding rod to adjust the position of the monitoring sensor according to the needs. After the device is pushed to a specific bedrock section position, the telescopic fixing assembly is used to effectively couple the microseismic sensor with the deep rock mass. According to the depth of each monitoring point in the borehole, multiple detection units can be assembled to realize microseismic monitoring of different parts of the monitoring hole with a larger depth by multiple microseismic sensors, which solves the problem of installation and effective coupling of multiple microseismic sensors and constitutes a more comprehensive and three-dimensional monitoring system.

[0041] 3. The front end of the present invention is provided with a drilling unit, which can effectively avoid the problem that drilling deformation affects the layout of the microseismic sensor and the phenomenon that the friction force in the deep hole damages the microseismic sensor.

[0042] 4. The present invention adopts a telescopic fixing component to effectively solve the problem that the microseismic sensor in a deep hole of soft rock and soil is difficult to couple with the hole wall and the problem that the sensor is difficult to install and protect.

[0043] 5. In the tunnel, the quick installation device allows for quick installation and recovery of deep microseismic sensors, and can form a three-dimensional arrangement of sensors. The sleeve structure can reduce noise interference in the monitoring hole, effectively avoid interference such as rock falling, and collect more useful microseismic signals. After the microseismic sensor completes the monitoring of the rock formation, the telescopic fixing component is contracted to allow the quick installation device to fall off the drilled rock mass. The sensor can be pulled out by dragging the microseismic sensor connection line, which is convenient and quick, and improves the recovery efficiency and recovery rate of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1It is a structural schematic diagram of a quick installation device for recoverable microseismic sensors suitable for different hole depths of the present invention.

[0045] Figure 2 It is a partial explosion schematic diagram of the recoverable microseismic sensor quick installation device suitable for different hole depths of the present invention.

[0046] Figure 3 It is a cross-sectional view of an invented quick installation device for a recyclable microseismic sensor suitable for different hole depths.

[0047] Figure 4 yes Figure 1 A partial disassembled schematic diagram of a part of the present invention shows a detection unit.

[0048] Figure 5 It is a schematic diagram of the structure of the detection unit of the present invention without the outer shell and the rear side of the rock formation coupling plate.

[0049] Figure 6 It is a cross-sectional view of the detection unit of the present invention.

[0050] Figure 7 It is a schematic structural diagram of the bottom view of the detection unit of the present invention. DETAILED DESCRIPTION

[0051] In order to make the advantages and technical solutions of the present invention more clear and explicit, the present invention is described in detail below in conjunction with specific embodiments.

[0052] Embodiment 1, combination Figures 1 to 7 A quick installation device for a recyclable microseismic sensor suitable for different hole depths includes a handheld unit 1, a detection unit and a drilling unit 2. The handheld unit 1 includes a T-shaped handle 11 and a rear cover body 12. The T-shaped handle 11 is an integrated structure composed of two sections of steel pipes connected to each other, one section of the steel pipe is arranged horizontally, and the other section of the steel pipe is arranged horizontally longitudinally. The rear end of the longitudinally arranged steel pipe is fixedly welded to the middle part of the transversely arranged steel pipe, and its interior is connected to the interior of the transversely arranged steel pipe. The oil supply pipeline, cable and signal cable are located inside the longitudinally arranged steel pipe, and the ends can be respectively passed through the two ports of the transversely arranged steel pipe to be connected to corresponding external devices.

[0053] The rear cover body 12 is a circular steel plate with a central opening. The diameter of the rear cover body 12 is larger than the diameter of the rock drill hole. The rear cover body 12 is located on the front side of the T-shaped handle 11. The front end of the T-shaped handle 11 is fixedly connected to the center of the rear cover body 12. Specifically, the front end of the longitudinally arranged steel pipe passes through the central opening of the rear cover body 12, and its outer wall is fixedly welded to the rear cover body 12. The longitudinally arranged steel pipe is coaxially arranged with the rear cover body 12.

[0054] There are three detection units, which are located on the front side of the rear cover body 12 and arranged linearly in sequence. The corresponding ends of any two adjacent detection units are detachably fixedly connected. The rear end of the first detection unit is fixedly connected to the front side wall of the rear cover body 12, and the drilling unit 2 is arranged at the front end of the last detection unit. The drilling unit 2 is fixedly connected to the three detection units to form a straight rod structure.

[0055] The detection unit includes a housing 3, a detection rod 4, a microseismic sensor 5 and a telescopic fixing assembly. The housing 3 is a metal round tube with open ends at the front and rear ends. The rear end of the detection rod 4 is plugged into the interior of the housing 3 and slidably cooperates with the inner wall of the housing 3. Specifically, the inner wall of the housing 3 has two sections of guide grooves 31, and the two sections of guide grooves 31 are symmetrically arranged about the axis of the housing 3. Furthermore, the guide grooves 31 are dovetail grooves. Two strip sliders 32 corresponding to the guide groove 31 are symmetrically provided on the outer side of the rear part of the detection rod 4. The strip sliders 32 are fixedly welded to the outer wall of the detection rod 4. Each strip slider 32 is located in a corresponding section of the guide groove 31. The detection rod 4 slides forward and backward with the shell 3 through the two strip sliders 32. The cross-section of the strip slider 32 is a dovetail shape matching the guide groove 31. The strip slider 32 slides with the guide groove 31. At the same time, the circumferential outer wall of the upper part of the detection rod 4 also slides with the inner wall of the shell 3. The detection rod 4 can be telescoped relative to the shell 3, thereby adjusting the depth position of each microseismic sensor 5 inside the borehole to monitor the rock formations at different hole depths.

[0056] The outer wall of the shell 3 has two sections of recessed grooves 33 corresponding to the guide grooves 31, and the bottom of each section of the recessed groove 33 is provided with a long hole 34 extending along the axial direction of the shell 3. A positioning screw 35 is provided on the outer wall of the two strip sliders 32 on the side away from each other. The axis of the positioning screw 35 is arranged relatively perpendicular to the axis of the shell 3, and its end passes through the long hole 34 on the same side and is provided with a positioning nut. After the relative position of the detection rod 4 and the shell 3 is adjusted, the strip slider 32 can be locked on the side wall of the shell 3 by the positioning nut to realize the fixed connection between the detection rod 4 and the shell 3. The setting of the recessed groove 33 enables the positioning nut to be located inside the recessed groove 33 after the positioning nut fixes the detection rod 4 and the shell 3 on the positioning screw 35, and will not protrude from the outer wall of the shell 3. When the quick installation device enters and exits the drilling hole, it will not be stuck on the inner wall of the drilling hole due to the positioning nut.

[0057] The detection rod 4 is an integrated structure consisting of an upper connecting section 41, a necked section 42 and a lower connecting section 43 which are arranged in sequence from back to front. The outer diameters of the upper connecting section 41 and the lower connecting section 43 are the same, the outer diameter of the necked section 42 is smaller than the outer diameter of the upper connecting section 41, and an arc transition is used at the connection between the necked section 42 and the upper connecting section 41 and the lower connecting section 43.

[0058] The detection rod 4 is a hollow rod body with a closed front end. The microseismic sensor 5 is fixedly installed inside the lower connecting section 43. The signal cable of each microseismic sensor 5 enters the T-shaped handle 11 through the rear end of the detection rod 4 of the first secondary detection unit, and passes through a side port of the T-shaped handle 11 to be connected to the signal receiving end of the monitoring equipment.

[0059] The telescopic fixing assembly is located outside the front end of the housing 3, and includes an annular hydraulic bag 61 and four rock coupling plates 62. The annular hydraulic bag 61 is sleeved on the outside of the detection rod 4, and all the rock coupling plates 62 are evenly arranged in an annular shape on the periphery of the annular hydraulic bag 61, and the inner side of each rock coupling plate 62 is connected to the outer wall of the annular hydraulic bag 61. The annular hydraulic bag 61 is annular and made of nitrile rubber. The annular hydraulic bag 61 is sleeved on the outside of the necking section 42, and the inner side of the annular hydraulic bag 61 is fixedly bonded to the circumferential side wall of the necking section 42. The housing 3 can protect the microseismic sensor 5 and prevent the microseismic sensor 5 from being worn, and at the same time, it can make the detection rod 4 fit the rock wall more closely and increase its firmness.

[0060] The inner side of the annular hydraulic bag 61 is provided with an inlet and outlet oil branch pipe, the end of which extends to the inside of the detection rod 4 and is provided with a quick connector. Each inlet and outlet oil branch pipe is connected to the inlet and outlet oil main pipe located inside the detection rod 4 through the quick connector. The end of the inlet and outlet oil main pipe passes through the other side port of the T-shaped handle 11 and can be connected to the hydraulic oil station. The inlet and outlet oil main pipes and the inlet and outlet oil branch pipes of the hydraulic oil station supply oil or return oil to each annular hydraulic bag 61. When supplying oil, each annular hydraulic bag 61 expands outward, and the oil supply stops when the annular hydraulic bag 61 reaches the maximum expansion state; when returning oil, the annular hydraulic bag 61 contracts inward, and when the hydraulic oil in the annular hydraulic bag 61 is drained, it fits on the outer circumferential wall of the necking section 42 of the detection rod 4, and the oil return stops in this state.

[0061] The outer side of the annular hydraulic bag 61 is provided with a limit rod 63 of the same number and corresponding position as the rock formation coupling plate 62, each limit rod 63 body is arranged relatively parallel to the axial direction of the detection rod 4, and its two ends are respectively fixedly connected to the corresponding ends of the lower connecting section 43 and the upper connecting section 41, and the annular hydraulic bag 61 is located between each limit rod 63 and the outer circumferential wall of the necking section 42. Each limit rod 63 is provided with a guide through hole, and the guide through hole preferably adopts a square or rectangular structure.

[0062] The outer wall of the rock formation coupling plate 62 is an arc surface matching the inner wall of the borehole, and a strip connecting plate 64 is arranged on the inner side thereof. Each strip connecting plate 64 is arranged along the normal direction of the cross section of the detection rod 4, and is slidably penetrated into the guide through hole of the corresponding limit rod 63. The cross section of the strip connecting plate 64 matches the guide through hole, one end of which is fixedly connected to the inner wall of the rock formation coupling plate 62, and the other end is connected to an inner arc plate 65, and each inner arc plate 65 is fixedly connected to the outer wall of the annular hydraulic bag 61 by vulcanization. When the annular hydraulic bag 61 expands, its outer wall drives each rock formation coupling plate 62 to expand outward through the strip connecting plate 64, and the outer side surface of the rock formation coupling plate 62 contacts and presses the inner wall of the borehole, so as to fix the microseismic sensor quick installation device inside the borehole; after the monitoring is completed, the annular hydraulic bag 61 discharges oil to make each rock formation coupling plate 62 shrink inward and separate from the inner wall of the borehole. After the oil is discharged, the inner wall of each rock formation coupling plate 62 is close to the corresponding limit rod 63, and the microseismic sensor quick installation device is taken out from the inside of the borehole and disassembled, and then the number of detection units is re-determined according to the hole depth of the next borehole, and it is reassembled for use.

[0063] The microseismic sensor 5 is fixedly arranged inside the front end of the detection rod 4, and the front end of the detection rod 4 is fixedly connected with the rear end of the housing 3 of the next detection unit by thread. The front end of each detection rod 4 is fixedly installed with a front end cover 44 in an embedded manner, and the microseismic sensor 5 is fixed on the rear side wall of the front end cover 44, and the front end cover 44 is fixedly connected with the front end of the detection rod 4 by bolts. When installing, the expansion glue is applied on the outer wall of the microseismic sensor 5, and after it is installed into the lower connecting section 43 of the detection rod 4, the microseismic sensor 5 is fixedly bonded with the cavity wall to achieve fixed connection with the detection rod 4.

[0064] The tube wall of the lower connecting section 43 is provided with a plurality of threading channels 45 evenly arranged in an annular shape, one end of the threading channel 45 is located on the front end surface of the lower connecting section 43 and is provided with a rubber plug, and the other end is located on the cavity wall of the lower connecting section 43. The signal cable of each microseismic sensor 5 can be inserted into the threading channel 45 of the previous secondary detection rod 4, and the inlet and outlet oil pipes of the annular hydraulic bag 61 can be inserted into the threading channel 45 of the previous secondary detection rod 4, and the signal cable and the oil outlet pipe are finally passed out from the other end of the T-shaped handle 11 to connect to the corresponding equipment.

[0065] The drilling unit 2 includes a drill bit 21 and a driving assembly, the driving assembly is fixed to the front end of the detection rod 4 of the last position detection unit, the drill bit 21 is located at the front side of the driving assembly, and is fixedly connected to the output end of the driving assembly, and the diameter of the drill bit 21 is slightly larger than the outer diameter of the housing 3. The driving assembly includes a motor box 22 and a servo motor, the motor box 22 is fixedly installed at the front end of the detection rod 4 of the last position detection unit, the servo motor is installed in the motor box 22, and its output shaft passes through the front side of the motor box 22 and is coaxially fixedly connected to the drill bit 21.

[0066] The wires of the servo motor pass through the threading channel 45 and enter the interior of the detection rod 4, and finally pass through one end of the T-shaped handle 11 to connect to the power supply equipment. The port of the threading channel 45 without cables inside is sealed with a rubber plug. After the microseismic sensor quick installation device is assembled, it is placed in the opening of the borehole and connected to the power supply equipment. After the servo motor is started, hold the T-shaped handle 11 with both hands and push the microseismic sensor quick installation device into the bottom of the borehole. Trim the inside of the borehole, or trim the deformed hole wall inside. This is a pretreatment step before installing the microseismic sensor to prevent the rock formation from deforming again after drilling, which makes it impossible to install the microseismic sensor inside the borehole. After the borehole is processed, clean the gravel and dust inside it, and then install the microseismic sensor inside the borehole.

[0067] In summary, compared with the prior art, the present invention has a simple structure, convenient and fast installation and disassembly, reduces labor intensity, improves installation efficiency, reduces costs, and its installation method is easy to operate, has high work efficiency, saves time and effort, and well protects the sensor from damage, reduces the interference of external construction on microseismic monitoring, and ensures that the sensor receives microseismic signals from the rock mass. It can be widely used in reservoir water storage, nuclear waste storage, underground storage of greenhouse gases, geothermal engineering, open-pit slope safety operation, fault orientation of oil and gas extraction, oil and gas well production stability, rock bursts induced by mining, roof collapse, ground pressure impact and other disasters. Safety monitoring, evaluation and management, at the same time, it can realize small-scale microseismic experiments, and play an important role in microseismic theoretical analysis, sensor sensitivity detection and positioning accuracy analysis, and comparison of the advantages and disadvantages of different algorithms.

[0068] Embodiment 2, combined Figures 1 to 7 , a method for quickly installing a recyclable microseismic sensor suitable for different hole depths, using the above-mentioned quick installation device for recyclable microseismic sensors suitable for different hole depths, the installation method includes the following steps:

[0069] Step 1: Determine the scope of the crushing area, stress concentration area, and original rock stress area of ​​the surrounding rock chamber, determine the detection position of the rock wall and the drilling depth of the detection position, then drill into the rock mass and use a high-pressure fan to remove the gravel and dust inside the borehole.

[0070] Step 2: Determine the number of microseismic sensors 5 to be deployed and the detection points of each microseismic sensor 5 at different depths of the borehole according to monitoring requirements, assemble the handheld unit 1, the drilling unit 2 and each detection unit into one, and pull the detection rod 4 of each monitoring unit out of its housing 3 to the maximum length and fix it to its housing 3.

[0071] Step 3: Connect each annular hydraulic bag 61 to the pipeline of the hydraulic oil station, and the hydraulic oil station starts to work to drain the hydraulic oil of each annular hydraulic bag 61, and the rock formation coupling plate 62 remains in a contracted state close to the outer wall of the detection rod 4.

[0072] The driving assembly of the drilling unit 2 is connected to a power source, and the drilling unit 2 is inserted into the borehole. After the drill bit 21 trims the inner wall of the borehole into a regular circle, it is taken out of the borehole, and the gravel and dust inside the borehole are removed again using a high-pressure blower.

[0073] Step 4, release the fixation between the detection rod 4 and its outer shell 3, adjust the relative position of the detection rod 4 and its outer shell 3 according to the detection point position of each microseismic sensor 5 in the borehole, and then re-fix each detection rod 4 to its outer shell 3.

[0074] Connect the signal cable connected to the signal end of each microseismic sensor 5 to the monitoring equipment, insert the assembled microseismic sensor 5 quick installation device into the borehole, and fit the rear cover 12 to the rock wall at the outer port of the borehole, so that each microseismic sensor 5 reaches the predetermined monitoring point.

[0075] Step 5: The hydraulic oil station supplies oil and pressurizes each annular hydraulic bag 61. The annular hydraulic bag 61 drives each rock coupling plate 62 outside it to move synchronously outward to achieve expansion. The rock coupling plate 62 adheres to and presses against the inner wall of the borehole. After that, the annular hydraulic bag 61 stops supplying oil and keeps the internal pressure constant.

[0076] Step 6, start each microseismic sensor 5 through the monitoring equipment, the microseismic sensor 5 collects the vibration wave signal from the rock wall in real time, and when the monitoring is completed and the microseismic sensor 5 needs to be moved, turn off each microseismic sensor 5, discharge the hydraulic oil of each annular hydraulic bag 61, and after the rock formation coupling plate 62 shrinks inward, take out the microseismic sensor 5 quick installation device from the borehole.

[0077] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0078] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0079] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0080] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A quick installation device for recyclable microseismic sensors suitable for different hole depths, characterized in that: It includes a handheld unit, a detection unit and a drilling unit, wherein the handheld unit includes a T-shaped handle and a rear cover body, wherein the rear cover body is located in front of the T-shaped handle, and the front end of the T-shaped handle is fixedly connected to the center of the rear cover body; There are at least two detection units, all of which are linearly arranged in sequence on the front side of the rear cover body, and the corresponding ends of any two adjacent detection units are detachably fixedly connected, the rear end of the first detection unit is fixedly connected to the rear cover body, and the drilling unit is arranged at the front end of the last detection unit; The detection unit includes a housing, a detection rod, a microseismic sensor and a telescopic fixing assembly. The housing is a round tube with two open ends. The rear end of the detection rod is plugged into the interior of the housing and slidably matches with the inner wall of the housing. The microseismic sensor is fixedly arranged inside the front end of the detection rod. The front end of the detection rod is fixedly connected to the rear end of the housing of the next detection unit by a thread. The telescopic fixing assembly is located outside the front end of the housing, and includes an annular hydraulic bag and a plurality of rock formation coupling plates. The annular hydraulic bag is sleeved on the outside of the detection rod, and all the rock formation coupling plates are evenly arranged in annular shape on the periphery of the annular hydraulic bag, and the inner side of each rock formation coupling plate is connected to the outer wall of the annular hydraulic bag; The drilling unit comprises a drill bit and a driving assembly, wherein the driving assembly is fixed to the front end of the detection rod of the last position detection unit, and the drill bit is located at the front side of the driving assembly and is fixedly connected to the output end of the driving assembly.

2. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 1 is characterized in that: The T-shaped handle is composed of two sections of steel pipes, one section of which is arranged horizontally, and the other section of which is arranged horizontally longitudinally. The rear end of the longitudinally arranged steel pipe is fixedly welded to the middle of the transversely arranged steel pipe, and its interior is connected to the interior of the transversely arranged steel pipe; The rear cover body is a circular steel plate with a central opening. The front end of the longitudinally arranged steel pipe passes through the rear cover body and is fixedly welded to the rear cover body to form a whole.

3. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 1 is characterized in that: The inner side wall of the shell is provided with two sections of guide grooves, and the two sections of guide grooves are arranged symmetrically about the axis of the shell; Two strip sliders corresponding to the guide groove are symmetrically arranged on the outer side of the rear part of the detection rod. The strip sliders are fixedly welded to the outer wall of the detection rod. Each strip slider is located in a corresponding section of the guide groove. The detection rod slides forward and backward with the shell through the two strip sliders.

4. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 3 is characterized in that: The outer side wall of the shell has two sections of sink grooves corresponding to the guide grooves one by one, and the bottom of each section of the sink groove is provided with a long hole extending along the axial direction of the shell; A positioning screw is provided on the outer wall of the two strip-shaped sliders on the side away from each other. The axis of the positioning screw is arranged perpendicularly to the axis of the shell. The end of the positioning screw passes through the long hole on the same side and is equipped with a positioning nut.

5. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 1, characterized in that: The detection rod is an integrated structure consisting of an upper connecting section, a necking section and a lower connecting section which are sequentially arranged from back to front, the upper connecting section and the lower connecting section have the same outer diameter, the outer diameter of the necking section is smaller than the outer diameter of the upper connecting section, and the connection between the necking section and the upper connecting section and the lower connecting section adopts an arc transition; The detection rod is a hollow rod with a closed front end. The microseismic sensor is fixedly installed inside the lower connecting section. The signal cable of each microseismic sensor enters the T-shaped handle through the rear end of the detection rod of the first secondary detection unit, and passes through a port on one side of the T-shaped handle to be connected to the signal receiving end of the monitoring equipment.

6. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 5, characterized in that: The annular hydraulic bag is in the shape of an annular ring made of nitrile rubber, and is sleeved on the outside of the necking section, and the inner side of the annular hydraulic bag is fixedly bonded to the circumferential side wall of the necking section; The inner side of the annular hydraulic bag is provided with oil inlet and outlet branch pipes, the ends of which extend to the inside of the detection rod and are provided with quick connectors. Each oil inlet and outlet branch pipe is connected to the oil inlet and outlet main pipes located inside the detection rod through the quick connector. The ends of the oil inlet and outlet main pipes pass through the other side port of the T-shaped handle and can be connected to the hydraulic oil station.

7. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 5, characterized in that: The outer side of the annular hydraulic bag is provided with limit rods, the number of which is equal to that of the rock formation coupling plates and the positions of which are one-to-one corresponding. Each limit rod body is arranged relatively parallel to the axial direction of the detection rod, and its two ends are fixedly connected to the corresponding ends of the lower connecting section and the upper connecting section respectively; The outer wall of the rock formation coupling plate is an arc surface matching the inner wall of the borehole, and a strip connecting plate is arranged on the inner side thereof. Each strip connecting plate is arranged along the normal direction of the cross section of the detection rod, and is slidably penetrated on the inner side of the corresponding limit rod. One end is fixedly connected to the inner wall of the rock formation coupling plate, and the other end is connected to an inner arc plate. Each inner arc plate is fixedly connected to the outer wall of the annular hydraulic bag by vulcanization.

8. The quick installation device for recoverable microseismic sensors suitable for different hole depths according to claim 5, characterized in that: A front end cover is fixedly installed at the front end of each detection rod in an embedded manner, and the microseismic sensor is fixed on the rear side wall of the front end cover and fixedly bonded to the cavity wall of the lower connecting section; The tube wall of the lower connecting section is provided with a plurality of threading channels evenly arranged in an annular shape, one end of the threading channel is located on the front end surface of the lower connecting section and is provided with a rubber plug, and the other end is located on the cavity wall of the lower connecting section; The driving assembly includes a motor box and a servo motor. The motor box is fixedly installed at the front end of the detection rod of the last position detection unit. The servo motor is installed in the motor box, and its output shaft passes through the front side of the motor box and is coaxially fixedly connected to the drill bit.

9. A quick installation method for recyclable microseismic sensors suitable for different hole depths, characterized in that: The recyclable microseismic sensor quick installation device suitable for different hole depths according to any one of claims 1 to 8 is used, and the installation method comprises the following steps: Step 1: Determine the scope of the crushing area, stress concentration area, and original rock stress area of ​​the surrounding rock chamber, determine the detection position of the rock wall and the drilling depth of the detection position, then drill the rock mass and use a high-pressure blower to remove the gravel and dust inside the borehole; Step 2: Determine the number of microseismic sensors to be deployed and the detection points of each microseismic sensor at different depths of the borehole according to the monitoring requirements, assemble the handheld unit, the drilling unit and each detection unit into one, and pull the detection rod of each monitoring unit out of its housing to the maximum length and fix it to its housing; Step 3, connect each annular hydraulic bag to the pipeline of the hydraulic oil station, the hydraulic oil station starts to work, the hydraulic oil of each annular hydraulic bag is completely drained, and the rock formation coupling plate is kept in a contracted state close to the outer wall of the detection rod; The driving assembly of the drilling unit is connected to a power source, and the drilling unit is inserted into the borehole. After the drill bit trims the inner wall of the borehole into a regular circle, it is taken out of the borehole, and the high-pressure blower is used again to remove the gravel and dust inside the borehole; Step 4, releasing the fixing of the detection rod and its outer shell, adjusting the relative position of the detection rod and its outer shell according to the detection point position of each microseismic sensor in the borehole, and then re-fixing each detection rod to its outer shell; Connect the signal cable connected to the signal end of each microseismic sensor to the monitoring equipment, insert the assembled microseismic sensor quick installation device into the borehole, fit the rear cover body to the rock wall at the outer port of the borehole, and each microseismic sensor reaches the predetermined monitoring point; Step 5: The hydraulic oil station supplies oil to each annular hydraulic bag and pressurizes it. The annular hydraulic bag drives each rock formation coupling plate outside it to move outward synchronously to expand. The rock formation coupling plate is attached to and pressed against the inner wall of the borehole. After that, the annular hydraulic bag stops supplying oil and keeps the internal pressure constant. Step 6: Start each microseismic sensor through the monitoring equipment. The microseismic sensor collects the vibration wave signal from the rock wall in real time. When the monitoring is completed and the microseismic sensor needs to be moved, turn off each microseismic sensor, discharge the hydraulic oil of each annular hydraulic bag, and after the rock formation coupling plate shrinks inward, take out the microseismic sensor quick installation device from the borehole.

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